disabling an assert that was causing failed test.

Per Jesse, this assertion is too difficult to support reliably.

gson/src/test/java/com/google/gson/reflect/TypeTokenTest.java

@@ -64,7 +64,8 @@ public final class TypeTokenTest extends TestCase {
     // listOfString = listOfUnknown  // doesn't compile; must be false
     assertFalse(TypeToken.get(a).isAssignableFrom(b));
     listOfUnknown = listOfString; // compiles; must be true
-    assertTrue(TypeToken.get(b).isAssignableFrom(a));
+    // The following assertion is too difficult to support reliably, so disabling
+    // assertTrue(TypeToken.get(b).isAssignableFrom(a));
   }
 
   public void testIsAssignableFromWithNestedWildcards() throws Exception {